Building-felt or construction material



R. P. PERRY.

BUILDING FELT 0R CONSTRUCTION MATERIAL. LICATION FILED OCT. 8. 1918.

1 386,277 Patented Aug. 2, 1921.

ATTORNEY waterproofing material materials, since oblong PATENT OFFICE.

RAY P. PERRY, OF UPPER MONTCLAIR, NEW JERSEY,

ASSIGNOR TO THE BARRETT COMPANY, A CORPORATION OF NEW JERSEY.

BUILDING-FELT OR CONSTRUCTION MATERIAL.

Specification of Letters Patent.

.Application filed October 8, 1918. Serial No. 257,395.

T 0 all whom it may concern.

Be it known that I, RAY P. PERRY, a citizen of the United States,residin at Upper Montclair, in the county of E ssex and 'State of NewJersey, have invented certain new and useful Improvements inBuilding-Felt or Construction Materials, of which the following is aspecification.

This invention relates to a new and useful building felt or constructionmaterial. It relates more specifically to felt which is made of fibrousmaterial, or even paper stock fibers, having distributedtherethroughcomminuted waterproofing material in the formof shot or substantiallyspherical particles, or particles which are not extended greatly in anydirection, but which are of appreciable size as contradistinguished todust or powder.

It has been found that when particles of in the form of powder or dustis introduced into the paper or felt during the formation of the sheetson w an ordinary paper-making machine having a foraminous cylinder, thesheets are not very porous,'but the fibers are closely knit with thefine particles of waterproofing material filling, to a considerableextent, whatever interstices there may have been between the fibers,thus rendering the sheets incapable of readily absorbing a large amountof liquid waterproofing material.

en waterproofing material in the form of filaments is introduced intothe sheets in a similar manner the sheets are rendered more porous, butif the filaments are made of 1112.- terial that is brittle when cold,some of them will be broken into short pieces as a result of handlingand bending the sheets after the are formed.

y this present invention the sheets have distributed therethroughparticles of waterproofing material which are solid at ordinarytemperatures and which are not considerably lengthened or extended inany direction. Pre erably, the particles are in the form of shot orglobules and are made of pitch or other bituminous material, though itis to be understood that the invention is not restricted to theseparticular shapes or or spheroidal or other shapes which will notreadily be broken upon bending the sheetsmay be used, and the materialsmay be I'OSlIl, wax, shellac, tallow or other waterproofing materialhich is olid a side when cold. Thesize of the particles may vary fromthose having a dimension as great as one sixteenth of an inch down tothose ust large enough to be caught on a hundred mesh screen. Thepreferable sizes are those whlch willpass through a thirty mesh screenbut will not pass through a hundred mesh screen. The porosity of. thesheets will vary, depending somewhat upon the size and number of theparticles distributed therethrough. I

The invention will be readily understood from the accompanying drawingwhich is view of a paper-making machine, partly in section.

In this view reference character T represents a tank having aforaminouscylinder C therein upon which is formed the usual layer 2 ofpaper or felt which is picked up by means of the wet blanket 3 passingaround the rolls 4 and 4'. The sheet passes along the suction box 5where a portion of Patented Aug. 2, 1921.v

the water is removed and then under-the v rated. into the sheet 2uponthe cylinder C and form a part of this sheet. These particles beingknitting or matting as closely as they otherwise would, thus making thesheet more porous and better adapted for absorbing li uid waterproofingmaterial during the su sequent saturating operation whenever such round,prevent the fibers from an operation is desirable, as wellas permittingready drying or evaporation of the moisture during the dryingoperationfl While any desired proportions of the ingredients used inmaking the sheet may be employed, I prefer to use between 10% and 90% bywelght of waterproofing material the remainder consisting of paper orfelt stock. 0

It is obvious that the drymg may be done by air instead of hotcylinders, and that the saturation of the sheets with liquidwaterproofing material may be accomplished, for example, by passing thesheets through a bath of the saturant.

The sheets produced in accordance wl h this invention are very porousand flexible;

they are not seriously impaired by repeated bending or flexing; theywill readily absorb a large amount-of waterproofing material; they areeasily dried; they contain a considerable proportion of waterproofingmaterial in the form of solid particles even before any saturatingoperation with liquid.

waterproofing material takes place.

Claims:

1. As an article of manufacture, a sheet of porous, flexible buildingfelt containing rounded particles of waterproofing material too large topass through a hundred mesh screen.

2. As an article of manufacture, a sheet of porous, flexible buildingfelt containing waterproofing material in the form of shot ofappreciable-size, and fibrous material.

5. As an article of manufacture, a sheet" of porous, flexible buildingfelt consisting of between 10% and 90% of waterproofing material in theform of rounded particles in size which will pass through a thirty meshscreen but will be caught 1 mesh screen, and'fibrous mater al.

In testimony whereof I affix my signature.

v v RAY P. PERRY.

211. a hundred

